Lead pot heater



May 26,1942 P, O ST'ER 2,283,981

LEAD POT HEATER Filed Jan. 3, 1940 f\ I z I i W -m $1. /8 INVENTOR. 2 PERCY M FORSTfR "1 M ATTORNEY.

Patented May 26,1942

"S'm'ii {YEP-T 'QFFIQE directly under the grill l4.. Insteadof placing the burner unit under the opening 26, a horizon- My invention relates to heaters, and particularly to a type of heater for heating lead pots, tar pots, etc., where molten metal, tar, etc., is spilled from the container onto the heater.

,The usual type of pot heater has a burner directly beneath the pot, with the result that when the pot is agitated, the molten material will run over the top of the container, down the outside, and drip into the burner, plugging one or several or all of the burner orifices.

My invention has for its object to overcome these objections and to provide a pot heater in which the burner orifice is not placed directly beneath the grill; matically draining any molten material spilling into the burner chamber; to provide means for maintaining in a molten state any spillage until it is drained; and to provide a non-clogging burner orifice.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of a preferred form of my invention which is illustrated in the drawing accompanyingand forming a part of-the specification. It is to be understood that I do not limit myself to provide means for autotally disposed cylindrical extension burner member connected to the end 32 of the elbow by a radial wall 34 .is employed. Itsother end is partially closed by the wall 36 having a centrally disposed opening 38 through which the combustible medium is introduced. In operation the-flame sweeps through extension 30 and into the elbow where the wall deflects it upwardly against the pot l2. By means of radial wall 34 and by having extension 30 of a smaller diameter than the elbow opening 32, the flame sweeps past the opening 24 without any substantial inter- I ference. Any spillage or overflow from-pot l2 through opening 26 will strikethe hot inner wall 40 andbe maintained in a molten condition until it drains through theopening 24. In this way, no matter how much molten material, or even liquids, which would normally extinguish a fire fall into the opening 25, they will not interrupt combustion of the burner butwill drain through to the showing made by the drawing. and description as I may adopt a variation'of the preferred form within'the scope of my invention as set forth in the claims.

Several different forms of my device are shown in the drawing, wherein:

Fig. 1 is a side View, partially in section;

Fig. 2 is a front view;

Fig. 3- is a top plan view;

Fig. 4 is a modified form in side view partially in section; and Fig. 5 is another modification, similarly shown.

In Fig. 1 I have shown a base H] on which the other parts of the device may be mounted. A detachable melting pot l2 sits on the'supporting grill [4 which may be attached to the base by support rods l6. Also supported by rods-I6 is a heat deflector plate l8. On this is mounted the burner chamber 20 by means of a screw 22.

The burner chamber 20 may be of several difierent forms, the essential thing being that there is provided somewhere in its lower extremity an opening 24 through which any material falling through the mouth 26 will drain from the chamber. A corresponding opening 28 in plate l8 allows the molten material to fall onto the base In from which it can easily be cleaned. The burner chamber preferably is made from a 90 elbow having the opening 26 located opening '24.

In the drawing I have shown a device set up for the use of gas which is conducted to the unit through pipe 42 regulating valve 44, manifold 46 and orifice 4B. The manifold unit 46 is supported by uprightmembers 50 and is spaced away from the burner chamber 20, 30' so as to avoid any overheating, because it is realized that the combustion or burner chamber becomes very hot. 'The gas leaves orifice 52 and enters the burner chamber through opening 38. Sufficient air to support combustion is induced by the flow of gas through this opening and burning takes place inside the chamber 30.

V The modifications shownin Figs. 4 and 5 are only two of many that are possible.

The difference in Fig.4 and'Fig. 1 is in the construction of the burner chamber 20, 30. In this modification the end opening of elbow 20 is larger than the outside diameter of horizontal extension 30. The two units are secured together at 62, thereby providing a crescent shaped open ing which is widest at point 64 and provides a sufiicient opening for any molten material to drain therethrough. An opening 66 in plate I8 also facilitates free flow of any materials through I molten materials will exhaust through opening 14 andthrough opening 18 in plate l8.

In all these cases the flames sweep along over the inner wall of the combustion chamber and thereby maintain it at such a temperature that no material can become cold enough during 1 operation of the burner to solidify.

Referring again to the construction shown in Fig. 4, the horizontal member 30 need not be rigidly secured to the elbow Mat 62. It is sufl'imember 45 is provided. To facilitate handling- 1 will bemaintained in a molten state and automatically discharged through said port without the escape of flame from said combustion chamber.

2. In a lead pot heater comprising a base, a melting pot, on open support upstanding from said base and including an annular grill at its upper end, and said grill having an opening therein of less diameter than the base of said pot, an elbow providing an upwardly curving combustion chamber having its lower wall mounted on said base within said support and its upper end opening upwardly beneath the opening in of the device while it is hot, a bail I1 is pivoted 1 at [9 to'grill l4.

While I have shown a right angle elbow 20, a portion of the burner chamber, it should be understood that the angle could be less or even more as thecase might be so longas the burner orifice 38 .isoffset with relation to the opening 26 intorwhich. spills any material from pot I2.

, The lengthoi the horizontally disposed extension member 30 can'be varied withoutdeparting'from the spirit of my invention or the claims appended hereto; One of the important features of my inventionis the provisionof a non-continuous bot-' tom at or near the lowest point in the burner chamber. This opening, such as 24 in Fig. 1,

should be located at a low point and-also at a 7 drical burner member communicating with the' opposite end of said chamber through the lower end of said elbow, said burner member extending substantially parallel with said base. and having itslower wall disposed a slight distance above the lower wall of said, chamber to' directafla me'into said elbow}. said lowermwallioir said'chamber I having an opening at the lowermost point in said chamber and at the juncture-between said elbow and cylindrical burner" member,. whereby .the droppings from said imelting pot into said elbow and v cause it to said grill, a horizontally disposed burner member communicating with the opposite end of said chamber through the lower end of said elbow,

said member extending parallel with said base and having its lower wall disposed a slight .distance above'the lower wall of saidchamber to direct'a flame into said elbow, said lower wall of said z chamberhaving a drain port arranged atzthe lowermost point insaid chamber at-said point of juncture between the burner member and elbow and out of alinement with said lower wall of said burner member, whereby droppings from said melting, pot within said elbow will be maintained'in a molten state and automatically discharged through said port without the escape of flame from said combustion chamber.

3. A lead pot heater comprising a base, a melt- .ing pot, an open support upstanding from said base and including an annular grill, said grill having an openingtherein of less diameter than the base of said pot, an elbow providing an arcuate combustion chamber having its lower curved-wall mounted on said base within said support and its upper end opening upwardly beneath the opening in said grill, said combustion chamber having a horizontal burner member of slightly less diameter than the up- 7 immediately below said burner extension, whereby droppings from said melting pot into said chamber will be maintained in molten condition and automatically discharged through said port without the escape of flame from said combustion chamber. I i i PERCY M. FORSI'ER; 

